Ore-separator.



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i J G EVANS om: SEPARATQR.

APPLICATION FILED NOV. 7, 1907.

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Specification of Letters Patent.

ORE-SEPARATOR.

Patented Aug. 25, 1908.

Application filed November 7, 1907. Serial No. 401,124.

T o all whom it may concern:

Be it known that l, Josnrn G. EVANS, a citizen of the United States,residing at Baker City, in the county of Baker and State of Oregon, haveinvented a new and useful Ore- Separator, of which the following is aspecification.

This invention relates to ore separators and is particularly designedfor either the dry or wet separation of gold from sand and gravel.

The object of the invention is to provide rifl'les of novel form inwhich the values will be precipitated, mechanism being utilized forimparting a jumping and rocking movement to facilitate the separation.

Another object is to provide means whereby each of the riffles may beintermittently opened during the operation of the sep arator for thepurpose of releasing the accumulated values from the rifl'les.

With these and other objects in view the invention consists of certainnovel features of construction and combinations of parts which will behereinafter more fully described and pointed out in the claims.

-ln the accompanying' drawings is shown the preferred form of theinvention.

, ln said drawings: Figure 1 is a side elevation of the machine, aportion of the table being shown in section. Fig. 2 is a plan view, aportion of the table being removed. Fig. 3 is a transverse section.

Referring to the figures by characters of reference, 1 designates a basehaving long standards 2 at one end and short standards 3 adjacent itsother end, each standard being provided with guides 4 in which areslidably mounted a push bar 5. A shaft 6 is journaled upon each pair ofstandards near the bottom thereof, and the two shafts are designed te beoperated in unison by a chain 7 mounted on sprockets 8 secured to theshafts. Mountedupon each end portion of each shaft is a cam 9 in theform of a ratchet wheel and the push bars are designed to rest upon theteeth of these cams. The cams are so positioned that while the bars 5 atone side of the machine are being moved upward the bars at the otherside of the machine are dropping into position upon the adjoining teethof the cams. Power may be transmitted to one of the shafts 6 through abelt 10 mounted on pulley 11.

Mounted on each set of push bars 5 is a cross bar 12 having heads 13 atits ends provided with sockets 14 into which the bars 5 project. Aninclined table 14 is secured at its ends to these cross bars and securedwithin the bottom at desired distances apart are transversely arrangedriflie plates 15 the lower edges of which are curved upwardly andrearwardly as indicated at 16 to produce pockets 17 for retarding thepassage of material along the table. Plate 15 has a series of openings18 extending from side to side thereof and registering with similaropenings 19 in the bottom of the table.

A slide 2() is mounted upon the upper portion of each plate 15 and isalso provided with openings 21 designed to register with the openings18. These slides may be retained in place in any preferred mannerpreferably by means of guides 22 lapping the upper face of the slide. Anarm 23 extends from one end of each slide and is pivotally connected toa bell crank lever 24 mounted. on the side of the table. All of the bellcrank levers are pivoted to a rod 25 extending alongside the table andmounted insuitable guide brackets 26. A pitman 27 is pivotally connectedto this rod 25 and also to a wrist pin 2S extending from a disk 29secured preferably to the shaft 6 mounted on the short standards 3. Apipe 30 is preferably supported above the upper end of the table and isdesigned to spray water thereon whenever desired.

ln using the machine the shafts 6 are set in motion by the mechanismdescribed and the bars 5 at one side of the machine will be pushedupward by cams 9 while the bars 5 at the other side of the machine aredropping after being released by those of the teeth which pushed themupward. lt will thus be seen that a lateral rocking movement is impartedto the table and the olting produced will be suflicient to move the sanddownward along the table and over the rili'les to the lower or dischargeend. The gold and black sand being of greater specific gravity than theother material on the table will settle within the pockets 17. Thesepockets will be opened twice during each rotation of the shafts 6because longitudinal movement is imparted to rod 25 through pitman 27thereby causing the bell crank levers 24 to swing downward and forwardand reciprocate the slides 20. The openings in these slides willregister with the openings 18 and 19 once during each movement of theslides. As soon as the openings register the sand contained in thepockets Will be free to fall downward into any receptacles which may beprovided for them.

What is claimed is:

1. In an ore separator the combination with a table and means forrocking the same transversely; of transversely extending riflies uponthe table and forming pockets having outlets in the bottoms thereof,parallel slidable closures for said outlets and extending transverselyof the table, an oscillatory actuating element carried by the table7revoluble means for operating the same during the transverse rocking ofthe table, and a plurality of levers connecting said element and therespective closures for shifting said closures transversely of the tableduring said rocking movement.

2. In an ore separator the combination with a table and mechanism forrocking the same transversely; oi transversely extending ril'lles uponthe table and forming pockets having outlets in the bottoms thereof,slides mounted within thc outlets and extending transversely of thetable,'said slides being flush with the upper face ofthe table,retaining means carried by the table and lapping the slides, and meansfor simultaneously reciprocating the slides during the transverserocking movement of the table, said slides being proportioned to openthe outlets during a fraction of each movement of the slides.

3. In an ore separator the combination with standards and guidesthereon; of toothed tripping elements revolubly mounted adjacent thestandards, vertically disposed push bars mounted within the guides andsupported solely by the tripping elements, cross bars, heads at the endsthereof and having sockets constituting seats for the upper ends of thepush bars, an inclined table secured upon the cross bars, and means forsimultaneously actuating the tripping elements to simultaneously raiseand lower opposite portions of the table to rock the same transversely.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

JOSEPH G. EVANS.

Witnesses:

GEO. II. FOSTER, MAY KELLY.

